Hey guys this is my second time posting. A while back actually about 5 month ago I got a ticket for proceeding contrary to sign at intersection 144(9). When the officer was asking me for my insurance and drivers license, i did not have the new insurance slip, 
thus he also gave me a ticket for…
Hello all
(simon or anyone else can feel free to answer)
I requested disclosure of a radar manual in original disclosure request. Didn't get disclosure until trial date, so an adjournment was granted. At that time the Provincial Prosecutor stated that it wasn't his policy to release the manual to…
so last night i was driving home at around 1am
i was going 120 in a 100 when a car started tailgating me (almost bumper to bumper)
i sped up in order to put some distance between us but it wouldnt leave me alone for over 10 minutes.
i was exhausted and not paying attention to my speed guage i ended up…
Hey folks. New forumer here.
Just curious to hear a few opinions on the following video taken at a photo enforced intersection.
As you can see, the light was still yellow for a fraction of a second as the camera-car entered the intersection (crossed the stop line), but it was close.
I drive a Honda Civic and we all know how those are when it comes to theft. On my driveway my brothers car was stolen twice and once broken in to. Also a few other cars have been stolen on my street. I have an alarm and all that. But say my alarm was going off and I ran outside and fought off the…
Hello all, yesterday I received a ticket for parking in a handicapped spot outside of school. I was done classes and had to load up my van with some very heavy and awkward items for transport. I had been parked in the garage across the street for the duration of my classes and decided to bring…
Sometimes I find plain simple English not quite so simple:
Green arrow(14) Every driver approaching a traffic control signal showing one or more green arrow indications only or in combination with a circular red or circular amber indication and facing the indication may proceed only to follow the…
Hi, recently I was driving home around 2:30pm from the bus stop I drive to in order to bus to school. I was traveling down Kennedy just past 19th seatbelt on, doing the speed limit. About one and a half kilometers past the intersection of Kennedy and 19th a fox sprinted across the road. I swerved…
Re: Stopping two cars
Reflections wrote:Lidar used by officers is invisible to the naked eye. You can however use nightvision to see them. I wonder why officers are not using nightvision to align the scopes???
I have used night vision to see the beam, very neat.
However, we are not trained/ qualified to align a scope. That must be done by the repair facility. What we do is ensure the unit is sighting properly, if the lidar fails the test, we place it out of service and send it for repair on the next Purolator truck.
Re: Stopping two cars
Reflections wrote:One thing though. I know that light travels at a constant speed in a vacuum. The atmosphere is not a vacuum. Dirt, smog.....all those airbourne particles can effect light. How would this be compensated for....? I know you're coming back to this 'bear so..... The further away a target is from the gun the more the "light" is going to slow down, simple physics. Is there a setting you have for "smoggy" days??? I know there are foul weather modes on different models. You cannot compensate for the unknown.
To my use, I start observing vehicles about 1km away (through scope) monitor, then hit the vehicle with lidar around 700m. Then again around 550m. Then my final hit is around 500m-100m. This allows a visual observation, confirmed targetting history. The lidar beam is very concentrated being this close and any smog would be less than minimal affect.
The addition of moisture in the air reduces the effective range of the lidar. ie light rain might reduce my first reading from 700m down to 500m. Snow is just horrible and a waste of my time using a lidar. It is not affecting the accuracy of the readings, just how far away a vehicle can be targetted.
Re: Stopping two cars
And at the end of the day, I would rather use lidar.
At 100m
Lidar = 30cm beam width
Radar = 20 metres
There is absolutely never any doubt with lidar which vehicle is travelling what speed.
although......my best is at night, obtain a speed via radar/lidar, catch the vehicle and then pace it....then pull up beside and READ the drivers speedometer. (even more icing on the cake when the speedometer is digital 
)
Re: Stopping two cars
New civic's are very nice for you......
Your style is very thorough. Next time you have the oppertunity on a smoggy day, light someone up from 1 km and keep the gun on them. If the speed decreases the closer they get closer then there is some effect.
I know you'll say they let they're foot off the gas but this would help prove the theory.
Re: Stopping two cars
Reflections wrote:New civic's are very nice for you......Your style is very thorough. Next time you have the oppertunity on a smoggy day, light someone up from 1 km and keep the gun on them. If the speed decreases the closer they get closer then there is some effect.
I know you'll say they let they're foot off the gas but this would help prove the theory.
I'll give that a shot....pardon the pun!!
Re: Stopping two cars
Just for giggles try it at night so they don't see you......
Re: Stopping two cars
but won't know if it's smoggy 
Re: Stopping two cars
Is there a way of uploading pics on this forum? I have a few NURBS pics.
Re: Stopping two cars
Imax wrote:Is there a way of uploading pics on this forum? I have a few NURBS pics.
The best way is to store your pictures on any free file storing website.
www.Photobucket.com is free and provides 1 GB of free space.
Once you have uploaded your picture you can simply post your picture/image on this forum using bbcode:
Code: Select all
[img]http://your-image-link-goes-here.com/image.jpg[/img]Re: Stopping two cars
thanks admin. It's working 
NURBS setup. Two cars, one at 500m and one at 570m. Laser offset, 10m. The laser beam is a cone, 600m long and 1.8m at the base.
A perspecive:
Close up view:
When looking at the close up, its not too bad. Any beam hitting the side of car one wont be received by a lidar. But my NURBS model for car 1 and 2 arent realistic. They are two blocks, one on top of the other. Ive missed on important aspect, side view mirrors.
Re: Stopping two cars
Good shots and they explain a lot. As much as they are not "perfect" they do demonstrate the problems facing officers. The third one's the best.....good job.
Re: Stopping two cars
maybe a mod can spilt this over to the law enforcement tools area... somewhere above this....
*************************************
seeing that a lane is 3.75m wide a typical car is 2.6m wide.......beam width is still less than the width of the car.
At 500m beam is 1.5m wide. One at 570m...round it to even 1.8m for simplicity sake.
Your "blocks" are realistic for Jeeps and Hummers 
Re: Stopping two cars
You can still see that it is difficult to target the plate..... And like you said you can't see the beam even under alignment checks. The officer still does not know "exactly" where the beam is.......at a distance of 500 meters 1 degree is a lot, even 0.5 degrees of misalignment will cause this situation.
Re: Stopping two cars
hwybear wrote:maybe a mod can spilt this over to the law enforcement tools area... somewhere above this....*************************************
seeing that a lane is 3.75m wide a typical car is 2.6m wide.......beam width is still less than the width of the car.
At 500m beam is 1.5m wide. One at 570m...round it to even 1.8m for simplicity sake.
Your "blocks" are realistic for Jeeps and Hummers
You are right, this thread is too long and discussion of lidars hijacked the thread. I shall have admin make me a mod for this section too and split it off.
Re: Stopping two cars
Reflections wrote:You can still see that it is difficult to target the plate..... And like you said you can't see the beam even under alignment checks. The officer still does not know "exactly" where the beam is.......at a distance of 500 meters 1 degree is a lot, even 0.5 degrees of misalignment will cause this situation.
I still do not see it when the beam is not relative to the distance. Nor are the size of vehicles. It to one perspective is construed, something like stats are! 
